Function createHistoryCopyButton

script.js:290–333

(text)

    }

    function createHistoryCopyButton(text) {
        const btn = document.createElement('button');
        btn.className = 'tui-button tui-bg-green-black history-copy-btn';
        btn.textContent = '[ COPY ]';

        btn.addEventListener('click', async function() {
            const originalText = btn.textContent;
            btn.textContent = '[ ... ]';
            btn.disabled = true;

            try {
                if (window.isSecureContext && navigator.clipboard && navigator.clipboard.writeText) {
                    await navigator.clipboard.writeText(text);
                } else {
                    const tempTextarea = document.createElement('textarea');
                    tempTextarea.value = text;
                    tempTextarea.style.position = 'fixed';
                    tempTextarea.style.left = '-9999px';
                    document.body.appendChild(tempTextarea);
                    tempTextarea.select();
                    document.execCommand('copy');
                    document.body.removeChild(tempTextarea);
                }

                btn.textContent = '[ ✓ ]';
                btn.classList.add('copied');

                setTimeout(() => {
                    btn.textContent = originalText;
                    btn.classList.remove('copied');
                    btn.disabled = false;
                }, 2000);

            } catch (error) {
                btn.textContent = '[ X ]';
                setTimeout(() => {
                    btn.textContent = originalText;
                    btn.disabled = false;
                }, 2000);
            }
        });

        return btn;
    }

    function makePreviewClickable(previewDiv, fullContentDiv) {
        let isExpanded = false;